Workers on the Shuttle program said there were issues with the O-Rings but nothing happened till after the shuttle blew up on lift off.
....we do not try and prevent things from happening.
1) Of course one MIGHT think to note that the USA was the only nation even building and flying ANY Shuttles, and that orbital flight is still an incredibly dangerous thing to do, but that might not suit your outlook. Of course machines will fail. Of course accidents will happen.
2) Sigh!...DO be so very kind as to provide some/ANY examples from human history where an even slight excuse for a functioning society ever became or long-remained so, by devolving into scared and pathetic little children, who's purpose in life wasn't to make fine and amazingly wonderful things happen, ...and instead strove only to "try and prevent things from happening"...? I'm all ears here...?
"....we do not try and prevent things from happening." Thank God for that philsophy! None of our european ancestors would've ever even started their treacherous and dangerous voyages across the Atlantic had they shared your sentiments. It's a damn sure thing that those founding fathers of this Nation wouldn't have ever taken even the first steps towards any Freedom here, if all they were concerned with was "safety", as if anything of the sort's truly possible in this world anyway. Of course...those were also people that would've looked at anyone even suggesting their personal disarmament as complete and hopeless lunatics. FYI: The fight at Lexington and Concord, "The shot heard round the world" came to be as the result of British troops being sent to take the colonists' powder and shot stores from them.
That's right folks....The first small battle of the American Revolution was a direct result of attempted "gun control". Consider that for at least a moment here. You want to try and "prevent things from happening"? Leaving the legal owners of over 300 million firearms alone might just be a good place to start....Unless of course...such as yourself wish to try kicking in armed citizens' doors to steal their weapons from them...?
Go to 4:14 in this video for an intelligent reference to "assault" weapons, which I'll guarantee you can't even define, without first looking up what the megalomaniacal sociopaths currently infesting DC want you to think about such....?